Fix Windows Defender Service Not Starting (Error 404)
If you see error 404 when trying to start Windows Defender, it usually means the service executab...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Windows Terminal JSON Schema Validation Error
If you see a JSON schema validation error when opening Windows Terminal or editing its settings f...
Fix Windows Defender Error 0x80070422: Step-by-Step Guide
Windows Defender error 0x80070422 usually appears when you try to open Windows Security or run a ...
Fix PowerShell High Memory Usage on Startup
If PowerShell consumes a large amount of memory (e.g., >200 MB) immediately upon opening, somethi...
Fix Windows Security Service Not Running Error
You open Windows Security and see a red banner: “Windows Security service is not running.” Or you...
Fix Microsoft Teams Token Expired Sign-In Loop
You sign into Microsoft Teams, the window closes, and then it prompts you to sign in again. This ...
Topic paths
Quick titles
Fix Outlook Issues by Resetting Your ProfileFix OBS Black Screen Issue After UpdateFix Outlook Error 0x800ccc0f DNS ProblemTroubleshooting Teams Offline Installer Won't OpenTroubleshooting Docker Exit Code 1 Permission ErrorTrust Self-Signed Certificate in Windows TerminalTroubleshoot Slow PowerShell ISEHow to Fix Offline Update Installation Errors in Windows 10